The theoretical phylogeny of whales is well documented<ref>http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0007062</ref> so the "counterexample" about whales should be removed.
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The theoretical phylogeny of whales is well documented, [http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0007062], so the "counterexample" about whales should be removed.